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本文研究了若干工艺因素:包套材质及其表面清理情况、包套内粉末的除气条件、热等静压锭坯尺寸及所用的粉末粒度组成和热等静压温度对FGH95合金压坯质量的影响。并用扫描电镜观察了Ni向包套及Fe向合金的扩散情况。试验结果表明:使用经喷砂的碳钢包套可以代替不锈钢包套;包套粉末在室温经较长时间除气可以得到满意的结果;在直径为260mm范围内,热等静压坯的密度和硬度的分布是均匀的。
In this paper, we studied a number of technological factors: the material and the surface clean-up conditions of the cladding, the outgassing conditions of the powder in the cladding, the size of hot isostatic billets and the particle size composition and the hot isostatic pressing temperature of FGH95 alloy compacts influences. Scanning electron microscopy was used to observe the diffusion of Ni into the cladding and Fe to the alloy. The test results show that the use of sandblasted carbon steel sleeve can replace the stainless steel sleeve; the envelope powder can get satisfactory results when degassing at room temperature for a long time; in the range of 260mm in diameter, the density of hot isostatic compaction and Hardness distribution is uniform.